It depends on how you accomplish the revolutions. Some of the revolutionaries were for including the minorities to one extent or another, arguing that they were in fact not minorities at all; Germans used this argument with the Jews for instance, arguing that they were merely German Jews, not a separate nationality. Or in the case of the Poles they were willing to offer up roughly 1/3rd of Posen as some sort of autonomous Polish duchy within a unified German state. On the other hand some of the revolutions were inherently contradictory to an extent; many of the Viennese and Prague revolutionaries didn't wish to see an end of the Hapsburg empire, they only wanted to modernize and reform it, where as the Hungarian nobles and peasants of course were revolting for their independence. The same with Danes & Germans in the First Schleswig War; the Danes wished to reform and modernize their country, bringing Schleswig & Holstein into the whole, where as the German minority in those two duchies wished to join a unified German state. So it'll depend on how things play out.
You also have to consider what you mean by 'successful' 1848 revolutions. The French were certainly successful in overthrowing the July Monarchy, but the Second Republic was exceedingly short-lived, and even before the reign of Louis-Napoléon Bonaparte certainly saw an end to what most of the February Revolutionaries had fought for with the end of the National Workshops after the June Days.
Also, are you only looking at the revolutions of 1848 in France, Poland, Hungary, and the German & Italian states? Because they were other, similar, movements in Spain, Switzerland, Britain, Belgium, the Netherlands, Denmark, Sweden, Romania, and Serbia during the same period that could have produced successful revolts with the appropriate POD(s), and in many of those areas minorities will certainly be an important issue during, and after, the revolution.